UNI Pro, Kodo Pro, and Ziva Pro all power standard 510 cartridges, but they solve different ownership problems. UNI Pro adapts to cartridge dimensions, Kodo Pro minimizes size and price, and Ziva Pro hides the cartridge in a streamlined draw-activated body. The right choice becomes obvious once you rank fit, protection, and controls.
Comparison at a glance
| Feature | UNI Pro | Kodo Pro | Ziva Pro |
|---|---|---|---|
| Connection | Magnetic 510 adapter | Direct 510 thread | Concealed internal 510 connection |
| Cartridge protection | High, adjustable chamber | Low, cartridge exposed | High, fixed chamber |
| Voltage style | Precise digital adjustment | Precise digital adjustment | Model-specific smart controls |
| Activation | Button | Button | Draw-focused operation |
| Display | OLED | Compact OLED | Integrated display/indicators |
| Best reason to buy | Universal fit control | Pocket size and value | Concealed clean shape |
Always check the current product listing because model revisions and included accessories can change.
UNI Pro: best for changing cartridge sizes
UNI Pro uses a magnetic adapter, adjustable height, and adjustable chamber width. Official specifications list a 2.0–4.2 volt range in 0.1-volt steps, 650 mAh battery, OLED display, and ten-second preheat. This combination gives it the most setup flexibility of the three; the UNI Pro manual walks through adapter and fit setup.
The chamber protects the cartridge while leaving the mouthpiece accessible. If you rotate between narrow and wide cartridges, the physical adjustment is more useful than a small difference in battery capacity.
The cost of that flexibility is complexity. You must keep track of the magnetic adapter, set height and width, and clean the chamber contact. UNI Pro is larger than Kodo Pro and takes more steps than a draw-activated Ziva.
Buy UNI Pro when you want one battery to accommodate varied cartridge shapes and you value exact on-screen voltage.
Kodo Pro: best for pockets and budget
Kodo Pro threads directly onto a cartridge and leaves it exposed. Official specifications list a 400 mAh battery, USB-C, OLED display, puff counter, ten-second 1.8-volt preheat, and a 1.8–4.2 volt range in 0.1-volt steps. Setup details are in the Kodo Pro manual.
Its advantage is concentration: strong controls in a very small body. There is no magnetic adapter and no chamber adjustment. The price is usually lower than the larger alternatives.
The exposed cartridge is the tradeoff. Side pressure in a pocket can damage a cartridge or thread, and the smaller cell needs charging more often. The compact screen and buttons also require deliberate handling.
Buy Kodo Pro when minimum size, direct threading, and precise low-cost control matter more than cartridge protection.
Ziva Pro: best for a concealed draw-activated format
Ziva Pro encloses the cartridge inside the body, creating a device shape that does not visibly resemble a cartridge-on-battery stack. Draw activation removes the need to hold a fire button during normal use, and the body protects the cartridge from many everyday knocks.
Unlike UNI Pro, the chamber is not universally adjustable. Cartridge width and height must fit the fixed shell. A leaking cartridge can also deposit residue inside the chamber where it is less visible.
Buy Ziva Pro when a clean concealed shape and draw activation lead the decision, and the cartridges you use fit its supported dimensions.
Cartridge compatibility
All three use 510 electrical threading, but physical compatibility differs. Kodo Pro avoids width limits because the cartridge sits outside. UNI Pro uses adjustments to accommodate a broad range. Ziva Pro depends on internal clearance.
Thread compatibility does not include proprietary pods. It also does not guarantee that an unusually low-resistance or damaged cartridge will operate safely. Read protection messages rather than trying to override them.
Voltage and preheat
UNI Pro and Kodo Pro are ideal for buyers who want an exact number on screen. The UNI Pro begins at 2.0 volts, while Kodo Pro extends down to 1.8 volts according to Yocan's official specifications. Both allow small increments — pair either with the 510 cartridge voltage chart to find a starting point.
Preheat gently warms a cartridge before normal activation. It is useful in cool conditions but should not be repeated continuously. Ziva Pro's exact controls should be checked on its current product page and manual because versions differ.
Portability and protection
Kodo Pro wins pure body size, but the complete setup includes the exposed cartridge. Ziva Pro creates the cleanest self-contained shape. UNI Pro is the bulkiest of the three, yet its adjustable chamber offers the strongest combination of protection and fit flexibility.
Think about where the device lives. A home or desk battery can prioritize controls. A pocket battery needs lockout and cartridge protection. A bag battery should be turned off and stored so nothing presses its button.
Maintenance
Kodo Pro has the simplest contact path: clean the battery thread and cartridge base. UNI Pro adds a magnetic adapter and chamber contact. Ziva Pro requires checking the hidden chamber for leakage and maintaining airflow.
No design eliminates cleaning. Remove cartridges for longer storage, keep them upright, and stop using a battery with abnormal heat or physical damage.
Which should you buy?
Choose UNI Pro if you use different cartridge dimensions and want exact control. Choose Kodo Pro if you want the smallest capable screen battery at a low price. Choose Ziva Pro if a protected, concealed, draw-activated body is your priority.
If you still cannot decide, start with the factor that causes the most inconvenience today. Broken exposed cartridges point toward UNI or Ziva. Frustration with bulky devices points toward Kodo. Cartridges that never fit fixed chambers point toward UNI.
Official specifications
Common questions
Is the UNI Pro better than the Kodo Pro?
It offers more cartridge protection and physical adjustment, while the Kodo Pro is smaller and usually less expensive. Better depends on whether fit flexibility or portability matters more.
Does Ziva Pro fit every 510 cartridge?
No fixed concealed chamber fits every possible width and height. Confirm dimensions and never force a cartridge into the body.
Which model has the easiest controls?
Ziva Pro emphasizes draw activation, Kodo Pro uses a compact screen and buttons, and UNI Pro adds width, height, and magnetic-adapter setup.
Which one protects the cartridge best?
UNI Pro and Ziva Pro conceal more of the cartridge than Kodo Pro. UNI Pro adds physical adjustability; Ziva Pro offers a cleaner fixed-shell design.